• Giant Sequoia Trees

    Sequoia & Kings Canyon

    National Parks California

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    Expect occasional 15-minute to 1-hour delays in Sequoia and Kings Canyon National Parks on weekdays only (times vary), including delays to/from the General Sherman Tree, Crystal Cave, and Grant Grove. More »

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Fire History

Fire History

Numerous species of conifers record the occurrence of forest fires. A fire may be recorded as a lesion in an annual ring when living cambium, usually on the margins of a catface, is injuring by the heat of the fire. Over time multiple injuries (fire scars) can occur.

Using dendrochronological crossdating methods actual calander dates can be assigned to each fire scar. These methods also mean that samples from trees dead for many decades (or centuries) can be utilized so that few living trees need to be sampled.

The dates on this ponderosa pine cross-section indicate fire scars that are recorded in the tree's annual growth rings. Reconstructions of fire regimes using this proxy data source can provide valuable information to managers and ecologists on the frequency and season of past fires. © Photo by Anthony Caprio.

Document http://www.nps.gov/archive/seki/fire/popup_window_firehist.htm
Last Modified 09/28/2007 10:16:54

Did You Know?

Rangers lay a wreath at the foot of the General Grant Tree, the Nation's Christmas Tree.

The General Grant Tree is the only living thing designated by Congress as a national shrine. This sequoia is a living memorial to the men and women of the United States who have given their lives in service to their country.